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Unread 17-01-2017, 20:04
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Re: ball "fuel" hopper sorter

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Originally Posted by Chris is me View Post
Part of the challenge is that most of these robots converted themselves into short-range dumpers before too long, since it was very easy for this style of robot to do that.

67 was a two ball wide shooter, but balls that came up in the middle shot just fine.

228 was not the greatest robot, but I'm very familiar with that example - a 3 inch diameter drum across the entire width shooter with a lexan hood allowed for those kind of shots.

Dumpers that had more of an active "shot" out rather than a slower puke could be argued to be this kind of shooter - 47's rebuild, 254 / 968, etc. come to mind.

100's shooter is pretty much perfect for this, but their hopper did divide into two single file channels (I'm not sure that was necessary, but that's how it was).

The key design details tend to be the use of a roller of uniform diameter rather than spaced wheels, and the use of a curved backboard made from a single piece of plastic rather than separate "rails" used on some hooded shooters.

If I recall correctly, the shift from shooters to a different archetype was known as vomit mode in some places of the internet. Just wanted to give newer people a different search term.

On second thought, use that term very wisely...
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Unread 16-01-2017, 13:12
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Re: ball "fuel" hopper sorter

The hoppers have a blender in them use a mini cim or bag motor to attach a verticle shaft and attach pieces of Lexan or metal and you have yourself a jam free hopper
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Unread 16-01-2017, 13:23
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Re: ball "fuel" hopper sorter

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Originally Posted by Zack-5421 View Post
The hoppers have a blender in them use a mini cim or bag motor to attach a verticle shaft and attach pieces of Lexan or metal and you have yourself a jam free hopper
This is a good approach to start with, but this is absolutely not the kind of thing you can be assured will be "jam-free" until you've thoroughly prototyped the exact geometry you will use on the competition robot.
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Unread 16-01-2017, 14:08
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Re: ball "fuel" hopper sorter

Our plan is to start prototyping this week once we have our drive base done!
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Unread 16-01-2017, 14:18
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Re: ball "fuel" hopper sorter

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Originally Posted by Zack-5421 View Post
Our plan is to start prototyping this week once we have our drive base done!
I'm happy for your enthusiasm, but before you've tested something, please don't make sweeping statements that suggest something absolutely works. People may read your comment and assume a level of experience or rigor that isn't there.
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Unread 16-01-2017, 14:10
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Re: ball "fuel" hopper sorter

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Originally Posted by Zack-5421 View Post
The hoppers have a blender in them use a mini cim or bag motor to attach a verticle shaft and attach pieces of Lexan or metal and you have yourself a jam free hopper
got an vids of this?
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Unread 16-01-2017, 14:29
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Re: ball "fuel" hopper sorter

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Originally Posted by saintblaze4639 View Post
if you look at hoppers of professional paintball guns that might be a good idea

Shhhhhhh.
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Unread 17-01-2017, 15:17
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Re: ball "fuel" hopper sorter

We have been working on a design based off of a gumball machine. We are doing a 14" disk with 3 5" holes along the perimeter and rotating that at the bottom of the hopper. It feeds the ball into a channel under the hoper very cleanly and in a nice cadence. This is not a trivial issue. It's much harder in practice than in your head. We have learned that the hard way
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Unread 17-01-2017, 16:03
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Talking Re: ball "fuel" hopper sorter

We are using the same concept as a paintball power hopper. Using a small motor with a rotor mechanism to keep pushing the balls around. It works great in my paintball hopper, we'll see if it works for this project. We're prototyping this with a small motor turning a lightweight rotor (3D Printed). Who knows. I really am hoping my team doesn't go obsessive/compulsive about this part of the game. I'd much rather spend time placing gears and hanging than wasting a load of time working on a shooter that shoots a ton load of balls for mediocre scores. Thank goodness the chassis, electricals, and gear delivery system is finished.
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Unread 21-01-2017, 15:52
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Re: ball "fuel" hopper sorter

Our team has a relatively flat base on the bottom, but it is lifted at such an angle that the balls naturally roll into position for our shooter to collect them and fire them. Angles can be your best friend sometimes. And so can simplicity.
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Unread 21-01-2017, 16:11
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Re: ball "fuel" hopper sorter

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Originally Posted by tiernan12992 View Post
Our team has a relatively flat base on the bottom, but it is lifted at such an angle that the balls naturally roll into position for our shooter to collect them and fire them. Angles can be your best friend sometimes. And so can simplicity.
Be careful about relying on gravity. Gravity-fed hoppers tend to jam and there's nothing you can do about it.
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